Electrolytic manganese dioxide, process for preparing the same, and manganese dry cell
CA 2191286 C · Owner: Inui, Michiko · Inventors: Sakurai, Yoshihiro; Inui, Michiko; Inoue, Takuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrolytic manganese dioxide having a composition of MnOx, wherein X is 1.90 to 1.96 an, adhesive moisture content of not less than 1.5% by weight as measured according to the procedure specified in JIS, and a content of bound water eliminative in the temperature range of 120 to 400°C of not less than 3.0% by weight as measured by gravimetry, a process for preparing the same and a, manganese dry cell comprising a cathode mix comprised of a mixing of the electrolytic manganese dioxide with a conductive acetylene black, preferably a conductive acetylene black having a BET specific surface area of 70 to 250 m/g, and an electrolyte composed mainly of zinc chloride and/or ammonium chloride.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 26, 1996 and granted November 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.